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(No Model.)

' G. SWEET.

-HARROW TOOTH. No. 386,094. Patented July 10, 1888.

I INVENTOR. G60 2:90 Sweet,

flttornel WITNESSES M v h n/W UNITED STATES ATENT OFFICE.

GEORGE SWVEET, OF DANSVILLE, NEW YORK.

HARROW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 386,094, dated July 10,1888.

Application filed January 9, 1888. Serial No. 260,198.

To aZZ whom it may concern:

Be it known that 1, GEORGE SWEET, a citizen of the United States,residing at Dansville, Livingston county, New York, have inventedcertain new and useful [mprovementsin Harrow-Teeth, of which thefollowing is a speciiication.

The object of my invention is to provide improved means for fastening orattaching harrow-teeth to their supports or standards. Various deviceshave heretofore been employed for this purpose, but many of them arecomplicated and expensive, and their adjustment is not in all cases easyor reliable.

My improved device isinexpensive to manufacture, simple, and reliable inoperation.

In the accompanying drawings, Figure 1 is a perspective view of thetooth mounted on its standard; Fig. 2, a side view of the tooth; Fig. 8,a side view of the bracket or standard to which the tooth is secured.Fig. 4 is a longitudinal section through the standard and the upper partof the tooth.

A indicates a support or standard of any suitable kind, to which theharrow-tooth is secured.

13 indicates the harrow-tooth, which is in this instance shown asaspringtooth, as I prefer this kind of tooth. The body of the tooth andthe working end may be of any suitable construction, preferably thatshown in the drawings; but I bend or twist the tooth at C, so as tobring the upper end of the tooth transverse,or at right angles to themain body of the tooththat is, so as to form a flat vertical portion, 0,for ready attachment to the vertical face of the standard. In this flatportion 0, I form a pivot-hole, D, and on opposite sides of thepivot-hole, and on one side of the end 0 of the tooth, I form a seriesoftecth or serrations, E, arranged in the arc of a circle from thebolt-hole as a center.

The standard is provided with a boss, F, which enters the hole D, andwhich forms the hearing or fulcrum for the tooth, and about which it isadjusted. The standard or casting A is provided on opposite sides of theboss F with serrations or teeth G, corresponding with the serrations Eon the tooth, and engaging therewith when the tooth is held ti htly inposition against the standard.

(No model.)

A bolt, H, having an adjusting-nut, I, eX- tends through the standardand through the boss and tooth and secures the tooth and standard firmlytogether. By loosening the nut the tooth and standard may be separated,so as to disengage the teeth or serrations and permit of the adjustmentof the harrow tooth about the boss or fulcrum F. When the bolt is againtightened, the tooth will he fix inly held in its adjusted position.

It will be observed that 1 form the soon ring devices on the standardand on the teeth directly, and there are no separate or intermediateparts for accomplishing the connection between the tooth and thestandard. The serrations on the upper end of the harrow tooth may bemade very readily with a die when the tooth is hot. The standard may beprovided or formed with teeth in any suitable way. For instance, theymay be cast thereon.

I claim as of my own invention 1. The combination of the standard havinga vertical face on one side, the curved springmetal twisted harrow-toothhaving a vertical face at its upper end, adapted to rest against thevertical face of the standard, the serrations on the upper end of theharrow-tooth, the serrations on the standard,with which the serrationson the harrow-tooth engage, and the securing-bolt extending throughholes in the standard and tooth for locking the tooth to the standard.

2. The combination of the standard,the boss formed thereon, theserrations on the stand ard on opposite sides of the boss, the twistedtooth having a bolthole in its upper cnd,and serrations formed in thearc of a circle on opposite sides of the bolt-hole, adapted to engagewith the serrations on the standard, and a securing-bolt extendingthrough the boss and through the harrow-tooth, substantially as setforth.

In testimony whereof I have hereunto subscribed my name.

G EORG E SWEET.

Witnesses:

J. M. EDWARDS, T. B. GRANT.

